After on-line upgarding avast home 4.1 to 4.1.357 i experienced endless crashes. It's this same with ABC 2.6.1, ABC 2.6.5 and Shadow 5.8.11 - wxmpython or BT issue, i don't no. It's in 1-2 day period.
With older version of avast home ed 4.1 i have 1-2 week uptime with BT always running and manualy restart XP system for maintenance.